Dissolved Oxygen Measurement
Dissolved Oxygen
Dissolved oxygen is present in virtually every liquid. For example, at a temperature of 20 °C (68 °F) and an atmospheric
pressure of 1013 mbar, saturated water contains about 9 mg/l oxygen. Ethanol can contain up to 40 mg/l, whereas
­glycerol only has about 2 mg/l.
Liquid absorbs oxygen until the partial pressure of oxygen in the liquid is in equilibrium with the air or gas in which it is in
contact. The actual concentration of dissolved oxygen depends on a number of factors, such as temperature, air pressure,
oxygen consumption by microorganisms in a biodegradation process or oxygen production by algae.
The oxygen concentration is important for the:
• Living conditions for fish and microorganisms in waters
• Degradation processes in wastewater treatment
• Corrosion processes in pipelines
• Shelf life of beverages, etc.
The determination of the oxygen concentration was formerly carried out by the WINKLER titration method. Today,
electrochemical measurement is a recognized method in numerous standard procedures. During the last years the
optical measuring of dissolved oxygen has become more important.
In its simplest form a dissolved oxygen sensor contains a working electrode and a counter-electrode. Both electrodes
are located in an electrolyte system which is separated from the sample by a gas-permeable membrane. The working
electrode reduces the oxygen molecules to hydroxide ions. In this electrochemical reaction a current flows from the
counter-electrode to the working electrode. The more oxygen present in the sample, the larger the current signal.
The D.O. meter calculates the concentration of dissolved oxygen in the sample from this signal. As for optical measurements there are no chemical reactions involved. A special fluorescent dye is used instead, which is activated by
light in the measuring membrane. In the presence of oxygen the fluorescence changes its character (quenching), this
effect is used for the quantitative determination.
54
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Parameter
Dissolved Oxygen Meters
Application Range Dissolved Oxygen Meters
Oxi 3315
l
–
m
l
●
●
l
–
–
●
l
AQA with documentation
l
●
●
l
–
–
●
l
R&D high precision
l
●
●
l
–
●
●
l
Control measurements
l
●
●
l
❍
●
●
l
LIMS connection
l
●
●
l
–
–
●
l
Quality assurance
l
●
❍
l
–
●
●
l
Training
m
●
❍
m
❍
l
❍
m
Service
–
–
●
l
●
●
●
l
Laboratory measurements
l
●
●
m
–
–
❍
m
Field measurements
–
–
●
l
●
●
●
l
–
–
–
l
–
l
–
Depth measurements
–
–
●
l
External control/
PC connection/
PC control
–
l
–
●
●
–
●
●
–
–
l
–
–
–
–
●
–
BOD measurements with selfstirring sensor
–
●
●
–
–
–
–
–
BOD measurements with
assessment program
–
–
–
–
–
–
–
–
56
58
65
60
64
63
62
61
see page
For dissolved oxygen measurement with multi-parameter instruments, see pages 14 and 18
Application Range Sensors
Application Range
FDO® 925
ConOx
DurOx®
CellOx® 325
StirrOx® G
TA 197 Oxi
BOD measurements
●
–
–
❍
●
–
Fish farming
❍
●
●
❍
–
–
Surface waters
●
●
❍
●
–
–
Ground water
●
❍
–
❍
–
●
Control measurements
●
●
●
●
❍
–
Depth measurements
● (25 m/82 ft.)
–
–
–
–
●
Laboratory measurements
●
❍
–
●
❍
–
Pharmaceuticals
●
❍
❍
●
–
–
Biotechnology (non-autoclavable)
●
❍
❍
●
–
–
Wastewater treatment plant:
aeration tank
●
❍
●
❍
–
–
Multi 350i/
3500i*
ProfiLine Oxi,
Multi 350i/
3500i*
all, except
MultiLine®,
Oxi 3315
inoLab® Oxi
7310, 1970i
1970i
applicable instruments: Oxi 3315, MultiLine®
3410, 3420, 3430
* North American version
inoLab® Multi IDS
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
pH
Oxi 3310
●
ORP
Oxi 3210
m
ISE
Oxi 3205
–
Dissolved
Oxygen
(D.O.)
MultiLine® IDS
–
Conductivity
Profi­Line
Oxi 1970i
m
Data logger/
flow + level
Oxi 7310
Routine measurement
Routine measurement with
documentation
Application Range
BOD/
Respiration
Multi IDS
Portable Meters
Photometers
inoLab®
Multiparameter
– Not recommended
Turbidity
m Conditionally applicable
Colony
Counter
l Recommended by WTW
Software/
Printers
55
NEW
Laboratory Dissolved Oxygen Meters
Dissolved oxygen is one of the most frequently measured
parameters in the laboratory. I­t plays a large role in the degradation of substances and the growth of microorganisms,
both in environmental technology and in biotechnology.
inoLab®
Dissolved oxygen measurements with new digital
multi-parameter benchtop
meters inoLab® IDS
see page 14
Determining dissolved oxygen …
… with the innovative inoLab® Multi 9310 IDS
The new inoLab® Multi 9310 IDS is ideal for digital, optical DO measurements in the laboratory. The IDS technology
perfectly supports measuring in the easiest way along with efficient documentation. Without self consumption and resistant against air bubbles, carbon dioxide and ethanol the optical DO sensor FDO® 925 is not only recommended
for BOD measuring, but also for further applications throughout the laboratory.
inoLab® Multi 9310 IDS
• Measuring safety without compromises
• Digital sensor recognition
• Intelligent sensor rating
Measuring safety
• Through digital transmission of signals the sensor data is
easily provided.
• Display of service information for supporting the ideal
function
• Maintenance free measuring system without use of
chemicals through factory calibrated sensor cap
• Automatic air pressure compensation for precise
measuring results
56
Oxi
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Parameter
Digital Laboratory Meters
GLP/AQA documentation
Multiparameter
• Automatic, digital recording of all sensor data for biunique traceability of measuring values
• User administration can be activated for allocation of user and measuring results
• Transfer of all data in .csv format via USB interface to PC, on demand formatted transfer into Excel
(MultiLab® Importer, included in the delivery scope or as download)
• Data output via optional built-in printer possible
pH
Flexible and powerful:
BOD/
Respiration
Data logger/
flow + level
Conductivity
Dissolved
Oxygen
(D.O.)
ISE
ORP
• Adjustable t90 for different applications
• Measures partial pressure, concentration
and saturation
• Salinity corrections
• Storage for large measuring batches
LCD graphic, backlit
CMC/QSC
Yes/Yes
Data storage
Manual 500/5000 automatic
Logger
Manual/time-controlled
Interface
Mini USB
Printer (optional)
Thermo printer, width 58 mm
Power supply
Universal power supply 100 to 240 V,
50/60 Hz, 4 x 1,5 V AA or 4 x 1.2 V
NiMH rechargeable batteries
Turbidity
1 (universal)
Display
Ordering Information
Digital inoLab® multiparameter SETs
inoLab® Multi 9310 IDS SET 4
IP 43
cETLus
Order No.
Digital multiparameter benchtop meter, set including IDS sensor, for measurements/documentation
according GLP/AQA. With single channel input for pH/mV, dissolved oxygen and conductivity. Meter
with universal power supply, stand and operation manual, optical IDS DO sensor FDO® 925,software
and USB cable.
3 Year
Warranty
1FD354
For other SETs or sensors in SET, see WTW Product Details
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Colony
Counter
inoLab® Multi 9310 IDS
Measuring channel
Software/
Printers
Model
Photometers
Te c h n i c a l D a t a
57
Reliable DO documentation…
… with the inoLab® Oxi 7310
The new inoLab® Oxi 7310 is the perfect laboratory meter
for measuring DO with the proven galvanic DO sensors.
With automatic GLP/AQA documentation it supports
traceability not only in the environmental laboratory. On
demand also available with built-in printer.
inoLab® Oxi 7310
• USB interface for fast data transfer
• Data output in .csv format or via
optional built-in printer
• Connection for self-stirring DO
sensor StirrOx® G
Measuring safety
• Repeatable measuring results
provided by the active, automatic AutoRead function with
recognition of stable end values
• Automatic air-pressure compensation
• Graphic display with plain text
menu for convenient and
secure operation
GLP/AQA documentation
• Alphanumeric entry of electrode
serial number
• Transfer of all data in .csv format via USB interface to PC, on
demand formatted transfer into
Excel (MultiLab® Importer,
included in the delivery scope
or as download).
• Data output via optional built-in
printer possible
58
Flexible and powerful:
• Measures partial pressure, concentration and saturation
• Salinity corrections
• Storage for large measuring batches
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Conductivity
Dissolved
Oxygen
(D.O.)
ISE
ORP
pH
Multiparameter
Parameter
Laboratory Meters
Te c h n i c a l D a t a
inoLab® Oxi 7310
All values ±1 digit
Concentration
0.00 … 20.00 mg/l ±0.5 % Mw.
0 … 90 mg/L ±0,5 %
Saturation
0.0 … 200.0 % ±0.5 % v. Mw.
0 … 600 % ±0.5 % v Mw.
Partial pressure
0 … 200.0 hPa, 0 to 1250 hPa
Temperature
-5.0 … 105.0 °C ±0.1 °C
Calibration
1-point air-calibration
or versus external standard
Calibration storage
up to 10 calibrations
Display
LCD graphic, backlit
Data storage
manual 500/5000 automatic
Logger
manual/time-controlled
Interface
Mini USB
Printer (optional)
thermal printer, width 58 mm
Power supply
Universal power supply 100 to 240 V, 50/60 Hz, 4 x 1,5 V AA or 4 x 1.2 V NiMH rechargeable batteries
Turbidity
Photometers
BOD/
Respiration
Data logger/
flow + level
Model
Ordering Information
inoLab® Laboratory Dissolved Oxygen Meter SETs
1BA301
inoLab® Oxi 7310P SET 4
Professional dissolved oxygen meter, menu controlled, for measurements/documentation according GLP/
AQA, with integrated thermal printer. Set including galvanic DO sensor. Meter with universal power
supply, stand and operation manual, self stirring galvanic DO sensor StirrOx® G, polishing stripe,
electrolyte, cleaning solution, replacement caps, CD-ROM incl. software, USB cable.
1BA304P
IP 43
cETLus
3 Year
Warranty
For other SETs or sensors in SET, see WTW Product Details
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Software/
Printers
Professional dissolved oxygen meter, menu controlled, for measurements/documentation according GLP/
AQA. Set including galvanic DO sensor. Meter with universal power supply, stand and operation manual,
galvanical DO sensor CellOx® 325, polishing stripe, electrolyte, cleaning solution, replacement caps,
CD-ROM incl. software, USB cable.
Colony
Counter
Order No.
inoLab® Oxi 7310 SET 1
59
NEW
Portable Dissolved
Oxygen Meters
Dissolved oxygen is an important parameter in environmental analytics. It is therefore commonly used for field operation. Its determination is processed in fish farming as well as
in wastewater plants for monitoring the stationary measuring technology.
Oxygen measurements with
the new digital MultiLine®
multi-parameter measuring
instruments see page 18
Not only dissolved oxygen is
determined securely…
… with the Multi 3410
The Multi 3410 is a portable single channel multi-parameter instrument for the digital measuring of dissolved oxygen. The IDS technology supports optimal measuring in the easiest way along with efficient documentation. Without self consumption and resistant
against air bubbles, carbon dioxide and ethanol the optical DO sensor FDO® 925 is not only recommended for BOD measuring, but
also for further applications throughout the laboratory. The Multi 3410 also allows connecting further sensors and parameters.
Multi 3410
• Measuring safety without compromises
• Digital, optical DO measuring
Oxi
• Multi-parameter instrument
Measuring safety
• Through digital transmission of signals the sensor data is easily
provided.
• Display of service information for supporting the best function
• Maintenance free measuring system without use of chemicals
through factory calibrated sensor cap
• Automatic air pressure compensation for precise measuring results
GLP/AQA documentation
• Automatic, digital recording of all sensor data for traceability of
measuring values
• User administration can be activated for allocation of user and
measuring results
• Transfer of all data in .csv format via USB interface to PC, on
demand formatted transfer into Excel (MultiLab® Importer,
included in the delivery scope or as download).
• Data output via optional built-in printer possible
General Features
Model
Multi 3410
Data storage
manual 500/10000 automatic
Data logger
manual/time-controlled
Interface
USB-A and Mini USB
Power supply
Universal power supply with charging
function or 4 x 1.2 V NiMH akku
Ordering Information
MultiLine®
Professional digital multi meter for portable field
measurement, with single channel input, color
graphic display incl. data logger and USB
interfaces. DO case set with optical IDS DO
probe FDO® 925, short instruction manual,
stand, beaker, CD-ROM, driver software for
USB, rechargeable batteries, cable, universal
power supply and accessories.
2FD454
Multi 3410
SET 5
Same as 2FD454, but with optical IDS DO
probe FDO® 925-3.
2FD455
Flexible and powerful:
•
•
•
•
•
60
Adjustable t90 for different applications
Measures partial pressure, concentration and saturation
Multi-parameter instrument
Color display
USB-A socket
Order No.
Multi 3410
SET 4
IP 67
cETLus
3 Year
Warranty
For other sensors in SET see
WTW Product Details
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
NEW
Parameter
Portable Meters
… with the latest ProfiLine Oxi 3315 and the optical IDS oxygen sensor FDO® 925
The new Oxi 3315 is a portable instrument for digital measuring of optical DO. The IDS technology supports ideal
measuring in the easiest way along with efficient documentation. Without self consumption and resistant against air
bubbles, carbon dioxide and ethanol the optical DO sensor FDO® 925 is not only recommended for BOD measuring,
but also for field and process applications.
• Digital, optical DO measurements
GLP/AQA documentation
• Automatic, digital recording of all sensor data for traceability of measuring values
• Transfer of all data in .csv format via USB interface to PC
ISE
ProfiLine Oxi 3315
• Measuring safety without compromises
Dissolved
Oxygen
(D.O.)
BOD/
Respiration
• Through digital transmission of signals the sensor data is
easily provided.
• Increased solution of measuring concentration 1 mg per
0.001 mg/l for trace measurements
• Maintenance-free measuring system through factory
calibrated sensor cap
• Automatic air-pressure compensation
• Adjustable t90
for different
applications
• Measures partial
pressure, concentration and
saturation
• Salinity corrections
• Storage for large
measuring batches
Conductivity
Measuring reliability
Flexible and powerful:
Data logger/
flow + level
• Complete documentation
ORP
Determining dissolved oxygen…
pH
Multiparameter
ProfiLine 3000 Series
Oxi 3315
Display
LCD graphic, backlit
Calibration
vapor-saturated air, if applicable against external standard
Data storage
manual 500 data records; automatic 5 000 data records
Data output
.csv or ASCII
Measuring channel
1
Logger
manual/time-controlled
Interface
Mini USB
Power supply
4 x 1.5 V AA or 4 x 1.2 V NiMH rechargeable batteries or via USB
Turbidity
Model
Photometers
Te c h n i c a l D a t a
Order No.
Oxi 3315 SET 1
Professional, field proven DO meter for digital IDS DO sensors with backlit graphic display for portable
application including data logger and USB interface. Case set including optical IDS DO sensor
FDO® 925, stand, beaker. Including short instruction manual CD-ROM, batteries, driver software for
USB, cable.
2BD351
Oxi 3315 SET 5
Meter see above, but with optical IDS DO sensor FDO® 925 and Bev kit (containing panel with meter
holder, flow through vessel, tube, tube adapter, meter armor SM Pro), without portable case.
2BD355
IP 66
IP 67
cETLus
3 Year
Warranty
For other sensors in Sets see WTW Product Details
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Software/
Printers
ProfiLine Portable Dissolved Oxygen Meter SET
Colony
Counter
Ordering Information
61
Reliable DO documentation…
… with the ProfiLine Oxi 3310
The Oxi 3310 is a combination of a robust portable meter
and data logger for gathering measuring data automatically
and PC supported evaluation.
ProfiLine Oxi 3310
ProfiLine Oxi 3310
• Waterproof USB interface for fast
data transfer
• Data output in .csv format
• Calibration versus external standard
possible (Winkler-titration)
Complete as SET
Measuring safety
• Repeatable measuring results provided by the active,
automatic AutoRead function with recognition of
stable end values
• Automatic air-pressure compensation
• Silicone keypad with tangible key click, optional
protective armor for field operation
GLP/AQA documentation
• Transfer of all data in .csv format via USB interface to
PC, on demand formatted transfer into Excel
(MultiLab® Importer, included in the delivery scope
or as download).
Flexible and powerful:
• Measures partial pressure, concentration and saturation
• Salinity corrections
• Storage for large measuring batches
62
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Parameter
Portable Meters
Measuring DO precisely…
… with the ProfiLine Oxi 3210
pH
Multiparameter
The ProfiLine Oxi 3210: A top-class portable DO measuring
instrument - with modern, user-friendly interface.
ORP
ProfiLine Oxi 3210
• Convenient user guidance
ISE
• Manual storage function
GLP/AQA documentation
• Storage with data output display or occasional
documentation.
Flexible and powerful:
Data logger/
flow + level
BOD/
Respiration
Software/
Printers
• Measures partial pressure, concentration and saturation
• Salinity corrections
• Storage for large measuring batches
Photometers
• Repeatable measuring results provided by the active,
automatic AutoRead function with recognition of
stable end values
• Automatic air-pressure compensation
• Silicone keypad with tangible key click, optional
protective armor for field operation
Turbidity
Measuring safety
Colony
Counter
ProfiLine Oxi 3210
Conductivity
Dissolved
Oxygen
(D.O.)
• For galvanic DO sensors
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
63
Measuring DO easily…
… with the ProfiLine Oxi 3205
The Oxi 3205 is an easy-to-use, reliable measuring instrument
for routine measurements.
ProfiLine Oxi 3205
• Suitable for CellOx® or DurOx® sensors
• Backlit graphic display
• Automatic air-pressure compensation
Measuring safety
GLP/AQA documentation
• Repeatable measuring results provided by the active,
automatic AutoRead function with recognition of stable
end values
• Safe operation: Automatic functions reduce the number
of keys (6).
• OxiCal® air-calibration
• Waterproof 8-pin socket for measurements in the field.
• Transfer of all data in .csv format via USB interface to PC,
on demand formatted transfer into Excel (MultiLab®
Importer, included in the delivery scope or as download).
Flexible and powerful:
• Silicone keypad with tangible key click, can be operated
with gloves
• For field operation available in a case set with proven
sensors
Te c h n i c a l D a t a
Model
Oxi 3205
Range/
O2 Conc.
Resolution/
O2 saturation
AccuracyO2 part. pressure
Temperature
0.00 … 20.00 mg/l (20.0 mg/l*) ±0.5 % of value; 0 … 90 mg/l ±0.5 % of value
0.0 … 200.0 % (200 %*) ±0.5 % of value; 0 … 600 % ±0.5 % of value
0.0 … 200.0 mbar (200 mbar*) ±0.5 % of value, 0 ... 1250 mbar ±0.5 % of value
-5.0 … +105.0 °C ±0,1 °C (23 … 221 °F)
Oxi 3210
Temperature compensation
Better than 2% at 0 ... +40 °C (32 … 104 °F)
Air pressure compensation
Automatic with built-in pressure sensor (500 … 1100 mbar)
Salinity correction
0 or 35 fixed
Calibration
OxiCal® rapid calibration in OxiCal®-SL or OxiCal®-D
Oxi 3310
Automatic from 0.0 … 70.0, adjustable via display
Memory/Logger
–
Display
LCD Graphic, backlit
Continuous operation
Up to 800 hrs. without/100 hrs. with backlight
Manual 200
Manual 500/5000 automatic
Ordering Information
ProfiLine Portable Dissolved Oxygen Meter SETs
Robust and waterproof portable dissolved oxygen meter for battery operation, case set with
DurOx® 325 and accessories
2BA103
Oxi 3210 SET 1
Robust and waterproof portable dissolved oxygen meter including memory, for battery operation,
case set with CellOx® 325 and accessories
2BA201
Oxi 3310 SET 1
Robust and waterproof portable dissolved oxygen meter including memory, data logger and USB mini
B interface, for battery operation, case set with CellOx® 325 and accessories
2BA301
IP 66
IP 67
64
Order No.
Oxi 3205 SET 3
cETLus
3 Year
Warranty
For other sensors in SET, see WTW Product Details
* if DurOx® DO sensor is used
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
ProfiLine Oxi 1970i
• High-precision, indestructible, waterproof
External control via PC with MultiLab® pilot. They
are equipped with a carrying/support handle and
carrying strap. The Oxi 1970i is suitable for depth
measurements down to 100 m (330 ft) in combination with the TA 197 Oxi depth a­ rmature.
ORP
• Recorder output corresponding to display
Multiparameter
The WTW dissolved oxygen meter ProfiLine Oxi 1970i, supplied with integrated powerful NiMH rechargeable batteries, is
both waterproof (IP 66) and sub­mer­si­ble (IP 67). This easy-to-use meter conforms to GLP and has an 800 data point data
logger and accurate recorder output.
pH
ProfiLine Dissolved Oxygen Field Meters
Parameter
Portable & Field Meters
Dissolved
Oxygen
(D.O.)
ISE
• Depths measure­­ment down to
100 m (330 ft)
TA 1 9 7 O x i
Data logger/
flow + level
Conductivity
Dissolved oxygen depth armature TA 197 Oxi with
built-in temperature probe, up to 100 m (330 ft)
cable with waterproof plug (IP 67), and pressureresistant steel armor with screw-off protective hood.
Fits into small boreholes (2“ dia.).
BOD/
Respiration
BR 325
Photometers
Battery-powered stirrer BR 325 for profile and depth
­measurements.
Te c h n i c a l D a t a
ProfiLine Oxi 1970i
O2 Conc. 0.00 … 19.99 mg/l (19.9 mg/l*), 0.0 … 90.0 mg/l (90 mg/l*)
O2 saturation 0.0 … 199.9% (199%*), 0 … 600%
Range/
Resolution
Automatic with built-in pressure sensor (500 … 1100 hPa)
Temperature compensation
<2% at 0 ... +40 °C (32 … 104 °F)
Salinity correction
Automatic from 0.0 … 70.0, adjustable via display
Calibration
OxiCal® rapid calibration in OxiCal®-SL or OxiCal®-D
Colony
Counter
Air pressure compensation
Turbidity
Accuracy O2 Conc. ±0.5% of value
(±1 digit)
O2 saturation ±0.5% of value
Temperature ±0.1 K
Ordering Information
Portable Dissolved Oxygen Field Meter
ProfiLine Oxi 1970i
IP 66
IP 67
cETLus
Order No.
Robust, waterproof, submersible dissolved oxygen meter
3 Year
Warranty
3B30-010
* depends on DO sensor and medium
Depth armatures for measurements down to depths of 100 m (330 ft)
see WTW Product Details
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Software/
Printers
Model
65
Galvanic Dissolved Oxygen
Sensors
WTW offers three types of galvanic dissolved oxygen sensors, none of which require polarization time prior to measurement as is the case with other DO sensors. WTW DO
sensors are equipped with preassembled membrane caps
preventing ­sensor prep errors caused by improper membrane installation, and have built-in temperature compensation capabilities.
FDO® 925
IDS Dissolved Oxygen
Sensors see page 12
Galvanic Dissolved Oxygen Sensors
• Immediately ready for measurement
• Simple air calibration using
­calibration vessel
DurOx® 325
Only for ProfiLine portable and field
meters and Multi 350i/3500i*
Membrane covered galvanic
dissolved oxygen sensor
• Membrane lasts up to 6 months
• Low approach flow (measurements
obtained with minimal sample flow)
• Waterproof sensor (IP 68 – 2 bar)
• Includes SK-D protective sensor guard
• Includes calibration vessel OxiCal®-D
* North American version
66
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
StirrOx® G
Parameter
Dissolved Oxygen Sensors
Accessories
Various calibration and storage vessels are available for
­dissolved oxygen sensors.
Turbidity
Photometers
see WTW Product Details
BOD/
Respiration
Data logger/
flow + level
Conductivity
Dissolved
Oxygen
(D.O.)
ISE
• Membrane lasts up to 6 months
• Features membrane leak monitoring
• Sensor includes automatic stirrer
• Waterproof sensor (IP 68 – 2 bar)
• Extremely low self-consumption of
oxygen
• Includes calibration vessel
OxiCal®-ST
• Membrane lasts up to 6 months
• Features membrane leak monitoring
• High signal resolution (prevents
weakened signal with longer cable
lenghts)
• Rapid measurement response
• Waterproof sensor (IP 68 – 2 bar)
• Includes calibration vessel OxiCal®-SL
pH
Self-stirring dissolved oxygen sensor –
simul­taneous ­stirring and measurement
Membrane covered galvanic
dissolved oxygen sensor
ORP
For all inoLab® Oxi and ProfiLine Oxi 1970i
Multiparameter
CellOx® 325
Order No.
StirrOx® G
Self-stirring dissolved oxygen sensor for oxygen determination in Karlsruhe bottles and Winkler bottles,
with OxiCal®-ST calibration and storage vessel
201 425
CellOx® 325
Galvanic dissolved oxygen sensor with OxiCal®-SL calibration and storage vessel, waterproof plug,
cable length 1.5 m (4.92 ft)
201 533
DurOx® 325-3
Galvanic dissolved oxygen sensor with OxiCal®-D calibration vessel, waterproof plug, cable length 3 m
(9.84 ft)
201 570
For calibration and storage vessels and other sensors and accessories,
see WTW Product Details
For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.
Software/
Printers
Dissolved oxygen sensors (The sensor includes accessory case with spare parts and maintenance supplies)
Colony
Counter
Ordering Information
67

Quantification of Tree-Geometric Characteristics: Sensor Platform UAV, Reza Ehsani

Body Sensor Market

Light Sensor Market

Position Sensor Market to Record Sturdy Growth by 2025

Industrial Wireless Sensor Networks Market

Industrial Wireless Sensor Networks Market

Physiological Monitor for the Prevention of Heat-Related Injuries